Radar Systems for Technicians

Appendix 2: Miscellaneous Information

Conversions and Constants

Work and Force

One dyne=one gram per sec per sec

One erg=one dyne-cm

One Joule=10 ergs

One Joule=10 7 dyne-cm

One Joule=(one Newton) (one meter)

One Watt=one Joule per second

One horsepower=746 Watts=550 ft-lbs/sec

Electrons and Charges

Charge on an electron, e,=1.6 10 19 coulombs

One coulomb=one amp for one second

One coulomb=6.2422 10 18 electrons

Distances

One meter=3.28 feet

One foot=30.8 cm

One inch=2.54 cm

One cm=.3937 inches

One nautical mile=6076.11549 feet=1.852000 kilometers=1.15077 US statute miles

One US statute mile=5280 feet=1.609 kilometers=.8689 nautical miles

Speed of Light (c)

582.75 10 6 nmi/hr

670.6 US statute miles/hr

161875 nmi/sec

186282 US statute miles/sec

983.571 10 6 feet/sec

11802.8 10 6 in/sec

2.9979 10 10 cm/sec

2.9979 10 8 m/sec

Radar Echo Time for Distance

one U.S. statute mile (5280 feet)=10.736 ?seconds

one international nmi (6076.11549 U.S. feet)=12.3552 ?seconds

one U.S. foot=2.03 nanoseconds

one U.S. inch=169.45 picoseconds

one centimeter=66.7 picoseconds

one meter=6.67 nanoseconds

one kilometer=6.67 ?seconds

Common Radar Times and Frequencies

60 miles: 741.3 ?secs

200 miles: 2471 ?secs

frequency of a one-mile range-mark oscillator: 80.9375 kHz

intermediate receiver frequencies: 30 MHz, 31.07 MHz, 60 MHz

Frequency Bands and Wavelengths

L: 25 cm or 9.8 inches @ 1.2 GHz

S: 10 cm or 3.9 inches @ 3 GHz

C: 6 cm or 2.4 inches @ 5 GHz

X: 3 cm or 1.2 inches @ 10 GHz

K u: 2 cm or 0.8 inches @ 15 GHz

K a: 1...

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